AZS Brick is a kind of fused cast zirconia-corundum refractory brick which is short writing of abbreviation that AZS from A of Al2O3, Z of ZrO2 and S of SiO2. Such as No.33 fused cast zirconia-corundum refractory brick adopts the AZS-33# as its abbreviation, No.36 fused cast zirconia-corundum refractory brick adopts the AZS-36# as its abbreviation and No.41 fused cast zirconia-corundum refractory brick adopts the AZS-41# as its abbreviation.
Properties of AZS Brick
- High Temperature,
- Erosion Resistance,
- High Compactness Property,
- Good Mechanical Property,
- Wear Resistance,
- Alkali corrosion resistance,
- Long service time.
AZS Brick Composition
AZS refractory brick with 33~45% ZrO2 content, uses industrial alumina powder and well selected zircon sand as the raw materials, which is poured into mould after being melted in the electric melting furnace. within injection model after melting electric furnace cooling and form of white solid, the petrographic structure composed of zirconium corundum and inclined stone eutectoid and glass phase composition.
| Chemical composition | AZS-33 | AZS-36 | AZS-41 | |
| ZrO2 | ≥33 | ≥35 | ≥40 | |
| SiO2 | ≤16.0 | ≤14 | ≤13.0 | |
| Al2O3 | a little | a little | a little | |
| Na2O | ≤1.5 | ≤1.6 | ≤1.3 | |
| Fe2O3+TiO2 | ≤0.3 | ≤0.3 | ≤0.3 | |
| Physical Properties | ||||
| Bulk density(g/cm3): | 3.5-3.6 | 3.75 | 3.9 | |
| Cold crushing Mpa | 350 | 350 | 350 | |
| Thermal expansion coefficient (1000°C) | 0.8 | 0.8 | 0.8 | |
| Exudation temp. of glass phase | 1400 | 1400 | 1400 | |
| Corrocion resistance of glass melt(mm/24h) | 1.6 | 1.5 | 1.3 | |
| Density | PT QX | 3.4 | 3.45 | 3.55 |
Manufacturing Process of AZS Brick for Glass Furnace
AZS brick prefers proportions of 1:1 zircon sand and industrial alumina powder, adds few volume of NaZO, B20 agent of fusion after mix perfectly through smelting and pouring into mould at high temperature of 1900~2000℃. resulting the AZS block contained 33% ZrO2 content. On the base, adopt part of desilicication zircon sand as the raw material to make the fused cast brick with 36%~41% ZrO2 content.
Application of AZS Brick for Furnace
AZS brick for furnace is mainly used as the high temperature refractory materials for resisting high temperature washing in glass industrial tank furnace, glass electrical furnace, slide of iron & steel industry, silicate of soda industry furnace. AZS fire brick also can be used in the metal smelting furnace and container for resisting slag erosion.
